Welcome to LookChem.com Sign In|Join Free

CAS

  • or

188820-20-4

Post Buying Request

188820-20-4 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

188820-20-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 188820-20-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,8,2 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 188820-20:
(8*1)+(7*8)+(6*8)+(5*8)+(4*2)+(3*0)+(2*2)+(1*0)=164
164 % 10 = 4
So 188820-20-4 is a valid CAS Registry Number.

188820-20-4Relevant articles and documents

Condensation reactions of guanidines with bis-electrophiles: Formation of highly nitrogenous heterocycles

Arnold, David M.,Laporte, Matthew G.,Anderson, Shelby M.,Wipf, Peter

, p. 7719 - 7731 (2013/08/23)

2-Amino-1,4-dihydropyrimidines were reacted with bis-electrophiles to produce novel fused bipyrimidine, pyrimidoaminotriazine, and pyrimidosulfonamide scaffolds. In addition, a quinazoline library was constructed using a guanidine Atwal-Biginelli reaction with 1-(quinazolin-2-yl)guanidines. The product heterocycles have novel constitutions with high nitrogen atom counts and represent valuable additions to screening libraries for the discovery of new modulators of biological targets.

Synthesis of Ethyl 2-Aminodihydro-5-pyrimidinecarboxylate Derivatives and 3,7-Diethoxycarbonyl-4,6-dihydro-2,4,6,8-tetraaryl-lH-pyrimido[1,2-a]pyrimidines

Milcent, Rene,Malanda, Jean-Claude,Barbier, Geo,Vaissermann, Jacqueline

, p. 329 - 336 (2007/10/03)

Reactions of ethyl 3-aryl-2-benZoylpropenoateS 1 with guanidine and N-alkyl(or benzyl)guanidines have been investigated. Ethyl 2-aminodihydro-5-pyrimidinecarboxylate derivatives 3, 4 or 5 and 3,7-diethoxycarbonyl-4,6-dihydro-2,4,6,8-tetraaryl-lH-pyrimido[

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 188820-20-4